Pallet for sintering machines



Patented Apr. 21, 1925. i

UNITED sT-TEs PATENT foi-Fica 30H19' KNOX, 0F PERTH AMBOY, NEW JERSEY, ASSIGNQR T0 D'WIGHT & LIJOYD TERING COMPANY, 0F NEW YORK, N. Y., A CORPORATIUN 0F DELAWARE.

PALLET FOR SINTERING MACHINES. D

Application `iled March 10, 1920. Serial No. 364,@13.

To @ZZ whom t may concern:

Be it known that I, JOHN KNOX, a subject lof the King of Great Britain and Ireland, residing at Perth Amboy, in the county of Middlesex and State of New Jersey, have invented certain new and useful Improvements in Pallets for Sinter'ing Machines, of which the following is a specification, reference being had therein to the accompanyine drawing.

liis invention relates to ore-carry-ing cars or pallets designed for use in sintering machines. l

@ne of the objects 'is to provide a pallet which will be self-cleaning, that-is to say, have parts which will automatically dislodge all of the particles of ore which may adhere to itafter a discharging operation, and leave it entirely clean before it rece'ves a fresh charge.

Another 'object is to form such a pallet with parts of a minimum number which can be cheaply constructed and easily assembled so that it will be self-contained in respect -to the movable devices which effect the cleaning referred to and will not require any external means to actuate said movable parts.

Another object is to so construct the parts l of a pallet that air passages or draft apertures of either of several areas can be provided in order to adapt the mechanism to the several sizes of the ore particles that are to be carried thereon. There must be openings through the grate part of the pallet of sulicient area to permit the passage of the required quantity of air to effect the oxidizing of the 'combustibles in the ore un'fo-rmly throughout the entire stratum on the pallets. On the other hand these air passages must be so dimensioned and arranged that the finer particles of the material will not sift through while the charge is on the pallet. The limiting of the area of the air passages in the grate'promotes the clogging thereof bythe particles during the initial charging of the pallets, and still more during the sintering operation when the particles tend to adhere to each other and to the metal of .l

' grate section.

the grate.

In they drawings- Fig. 1 is a plan View of a pallet embodying my improvements.

Fig. 2 is a vertical transverse section on the line 2;-2 of Fig. 1.

Figs. 3 and 4 are plan and side views respectively of the stationary part of the grate element of the pallet.

Figs. 5 and 6 are plan and side views respectively of the relatively movable part of the grate.

Figs. 7 and 8 are respectively end views of the stationary and of themovable grate parts. i

Fig. 9 is a sectional view taken on the line 9-,29 of Fig. 1, but showing the relative positions of the during the cleanslng operation.

The devices shown constitute one of the traveling sections or pallets of a sintering" parts of the grate elementl with a relatively thicker portion 1, the horif zontal shoulder 2 and the thinner upwardly tapering portion 3. At 5, 5 are projections upon which the wheels supporting the pallet are mounted. The walls 4, 4, of any required number, extend from side to side of the pallet and serve as parts of the carrier frame, also as supports for the grate, and as cut offs for air.

The grate is formed of two elements B and C. The element B, as shown in Fig. 3, l

resembles in appearance an ordinary stationary grate structure having the rela-v tively longer edge parts 6, 6 and the shorter edge parts 7, 7 at the ends. It is formed with alternating bars and apertures, the

slotlike apertures 8, 8, as shown, being approximately equal in area and ,equally spaced. Between each slot 8 and the next there is a bar 8a integral with the metal of the edge parts 6 and 7. The end part 7 of the grate element B rests upon the shoulders 2 of the end walls, which shoulders support said element in fixed positionrelatively to the pallet. As shown, the central parts of the side edges 5 6 rest upon the walls4 4 of the pallet and additionally support the To hold the grate element B rigidly VJin place, whilein operation, bolts 9, 9 .are inserted through holes 11, 11 inthe end partsV 7 of dthe' grate element. To avoid the weakening of the metal around the apertures 11.

` 11, l increase the vertical dimension of the end parts -7 at these points by casting them with the raised parts 7a.

rllhe relatively movable element C of the grate is substantially U-shaped in elevation, as shown in Fig. 6, and comprises a central longitudinal web member 12 and a series of transverse breaker bars or arms 13, 13a, cast integral with the web and preferably disposed at substantially right angles to the web portion 12. These breaker bars are preferably made of substantially the dimensions of the apertures- 8 in the stationary grate member, and normally lie in surface alignment therewith, so as togive a smooth grate surface and one which will prevent undue sifting of material in process of sintering therethrough, and yet willV permit the passage of draft currents through the grate. The two end bars or legs 13, 18a of the substantially U-shaped member are each formed with an aperture 14 and an enlargement 15 to strengthen the metal around the aperture. The bolts 9, 9, A described above, are long enough to be inserted through the apertures 14, 14 in the bars 13, and constitute pivotal sup orts for the entire movable element C of t egrate.

When the several parts of the grate structure are assembled the movable grate member will be in underslung position relative to the stationary grate member with the bars 13, 13n of the pivoted element C lying respectively in the slots 8 in the stationary section B; and the two bars 13 being adjacent the end parts 7, 7, the apertures 10 and 14 are in alignment to receive the bolts 9. n

The web art 12 is formed in such way as to provi e a clearance between the bot'- tom face of each cross bar 8a of the element B, and that part of the web member lying below it. The amount of this clearance determines the angle of the oscillation which may occur whlle the pallet is passing through any vertically curved part of its path; that is vto' say the pivotal movement of the oscillating section of the grate will be limited by the striking of the metal at 12a against the lower faces of the barsv 8EL at one side or the other of the central transverse vertical plane of the grate. rlhe clearance, therefore, need be only great enough to allow a positive and appreciable relative movement of the rate elements to loosen particles of materia which may be lodged in the air passages of the grate elements.

The web member v12 is made relatively.

dee as shown in Fig. 8, so that it will have su cient weight to rock the oscillating section when the frame is tipped from the horizontal, and to insure the return to the normal position' of the upper surfaces of the bars 13 when the frame is brought back to its operative position.

The manner in which devices of the sort .from its normal postion.

:Lacasse described are used is known and no extended dlscussion 1s necessary. The combustible ore, or the like material, is evenly l the stratum and through the air passages 16.

Some materials are in finer condition than others, and, for this, the rocking bars should have a width predetermined in .relation to the width of the slots 8. lNhere the matei rials, at any one place, which are to be treated vary from time to time in the neness of their particles, rocking grate elements with bars of different widths may be provided, so that one can be substituted for another to correspond withthe variations in the ineness of the materials. i

rlhe rocking bars ta er downward and also the bars 8 of the ed grate element. Consequently the spaces or passageways between them widen downwardly and this prevents the lodging of material below the upper edges of the bars. If particles while softened by heat adhere to the metal as', for eX- ample, to the metal of the upper surfaces, or at the edges of the bars, and, on cooling, remain so adhering, they are readily broken and dislodged when the bars swing up and A down under the gravity action of the heavy wehl2.'

The movements of the rocking element of the pallet are entirely automatic and caused by the gravity of the web. No external devices such' as links or supplemental parts are required to cause these movements.

' It will be understood that changes from the exact disclosure here, which are within the range of mechanicalskill, may be made,

and'that mechanical expedientsother than lthose here shown may be adopted and still be within the purview of my invention. For

example, while the term pallet is used as aptly descriptive of the disclosure here, it will be understood that any sintering element, other than a pallet, may be substituted -for the specific pallet here shown, and myA supporting surface and one part being adapted to automatically move under action of gravity relatively to the other to and 2; In anapparatus of the class described,

the combination of the bodily movable supl porting frame, and a grate thereon formed in two elements, one element being stationary relatively to the frame and having a series of slot-like apertures, the other element being oscillatable around a longitudinal axis and comprising a series of cross bars adapted to lierespectively in the said apertures and a connecting web member, the upper surfaces of both the grate ele, ments being normally in the same transverse horizontal plane, and gravity `actuated means for moving the oscillating element.

3. In an apparatus of the class described, the combination with the traveling supporting frame, of a stationary grate element having a series of transverse slots, and a horizontally pivoted grate elementcomprising a series of transverse bars and a longitudinally'depending web member, the said bars being adapted to lie one in each of said slots and with their upper surfaces normally in the same horizontal plane as that of the upper surface of the said stationary element, and the bars and the web being adapted to have their weight swing the bars toward and from said plane.

4. In an apparatus of the class described, the combination with the traveling supporting frame, of a grate formed of two elements, one element being stationary with respectto the frame and the other element being movable relative to the irst named element, and stops on the stationary element to limit the relative movement of the movable element.

5. In an apparatus of the class described, the combination with the traveling supporting frame, of a grate formed in two elements, the upper surface of both elements normally ,lying in the same horizontal plane, and one of said elements being held stationa .relatively to the frame, and the other eing adapted to rock vertically under the action of gravity, and means to limit the krocking movement of saidrmovable grate member.

6. In an apparatus of the class described, the combination with the traveling supporting frame, of a grate element having a plurality of slots formed therein and a horizontally pivoted grate element comprising a plurality of parallel bars respectively positioned in said slots and secured to a epending web member which swings around the -axisv of the grate element.

7. In a sintering pallet,y the combination of a stationary grate member having alternating bars and openings, and an underslung movable grate member having breaker bars extending upwardly into the openings in said stationary grate member.

8. In a sintering pallet, the combination of a stationary (grate member having alternating bars an openings; and an underslun pivotally mounted grate member having reaker bars extending upwardly into he openings in said stationary grate memer.

9. In a sintering palle-t, the combination of a stationary grate member having alternating bars and openings; an underslulfg, pivotally mounted grate member having breaker bars extending upwardly into the openings in said stationary grate member;

and means to maintain said breaker bars normally in surface alignment with said stationary grate bars.

10. In a sintering pallet, the combination of a stationary grate member having alternating bars and openings; an underslung,

pivotally mounted grate member having above its center of gravity and provided with breaker bars extendingvupwardly into the openings in said stationary grate mem- 12. In a sintering pallet, thecombination of a stationary grate member having alternating bars and openings; and an underslung, pivoted, pendulous grate member havin'gla web portion below said stationary grate bar and \breaker bars extending upwardly from 'said web portion into the openings in said stationary grate bar.

13. In a sintering'pallet, the combination of a stationary grate member having alternating bars and openings; and a gravity-controlled, pendulous grate member having a web-portion lying transversely of the bars and openings of said stationary grate member, with breaker bars at substantially right angles to said web portion and extending upwardly into the openings into said stationary grate member.

14. In a sintering pallet, the combination of a stationary grate member having alternating bars and\openings; an underslung, gravity controlled, pivoted grate member having breaker into the openings in said stationary grate member; and means to limit movement of said pivoted 'grate member.

15. In a sintering pallet, the combination of a stationary grate member having alternating bars and openings; an underslung, gravity controlled, pivoted grate member havin breaker bars extending upwardly into t e openings in said` stationary grate member; and means on said stationary grate llO bars extending upwardly member to limit movement of said pivoted l grate member.

nating bars and openings; an underslung,

gravity controlled, pivoted grate member h-aving breaker bars extending upwardly into the openingsin said stationary gra-te member and stops to `engage and limit movement of said pivoted grate member.

17. In a sintering pallet, the combination of a stationary grate member having alternating bars and openings; an underslung, gravity controlled, pivoted grate member having breaker bars extending upwardly into the openings in said stationary grate member; andstops on said stationary grate member to engage and limit movement \of said pivoted grate member.

18. In a sintering pallet, the combination of a stationary grate member having 'alter nating bars and openings; a movable grate member having breaker bars extending into the openings and normally in surfacealignment with the bars of said stationary grate member; and pivot bearings for said movable grate member above its center of gravity and so disposed as to permit rocking'of said movable grate member on an axis lat right angles to the bars and openings of said stationary grate member.

19. In a sintering pallet, the combination of 'a stationary grate member having alternating bars and openings; a. movable grate member made up of a` web-portion lying below and .at right angles to the bars and openings of said stationary grate member; breaker bars extendingupwardly from said 'Web-portion into the openings and parallel with the bars of said stationary grate member; and pivot bearings at the ends and above the center of gravity of said movable grate member to permit rocking of said movable grate member on an axis at right angles to the' barsand openings of said sta-` tionary grate member.

20.. Ina sintering pallet, the combination of a stationary grate member having alternating bars-and openings, and a substantially U-shaped movable grate member mounted beneath said stationary grate member and having pivot bearings in its legs and breaker bars between said legs, said breaker bars projecting upwardly into the openings in said stationary grate member, and normally in surface alignment with the stationary grate bars.

21. Inl a sintering pallet, the combination of stationary gratemember having alternating bars and openings, and a substantially U-shaped movable grate member lyin below said stationary grate member, an having pivot bearings in its legs and breaker bars of substantially the dimensions of the openings in the stationary grate member between said legs, said breaker bars projecting upwardly into the openings in said stationary grate member and normally in surace alignment with said stationary grate ars.

22. A movable grate member for sinter-l ing pallets, comprising a web-portion having breaker bars extending from one edgethereof at substantially right angles, and provided at each end with pivot elements disposed above its center of gravity.

lil)

23. A substantially U-shaped movable v grate member for sintering pallets, having pivot bearings in its legs and breaker bars eX- tending from one edge of its central portion `and disposed substantially at right angles to said central portion.

24. In an -apparatus ofthe class described, the combination of a traveling supporting frame, a plurality of stationary grate members having alternating bars and slots mounted on said frame, and a plurality of pivoted rate members comprising series of parallel ars positioned in the apertures of said stationary grate member and secured to a depending web member which is adapted to swing about the axis of said pivoted grate member.

In testimony whereof I aix my signature.

JOHN KNOX. 

